Table 7. Kinetic parameters of allopurinol and 12a against xanthine oxidase in the enzyme kinetic study.

Conc. (μM)	12a		Allopurinol
	K m	V max	K m	V max
XO	40	2.25	40	2.21
0.1	75	1.66	50	1.51
1	112	1.38	64	1.33
10	123	0.98	51	0.55